下面是一节高中英语课堂教学片段实录。 T: Arm yourself with sunscreen, sunglasses and a hatin a period of hot weather. S1: How can you arm yourself? You already have two arms —how do you put on more? T:Can we figure out the meaning of“arm”from the text?Look for another place where the word“sunscreen”appears. S2:In this sentence:“Health experts warned people,when outside,to apply sunscreen with a sun protection factor…” S3: So I think “arm yourself” is kind of “apply”. S1: Oh, that makes sense. Is he right? T:I could answer you,but I’d like you to find out the meaning of “arm” in the dictionary. … T: Got it? Can you explain it in English? S4: Yes, it’s a verb, different from the noun“arm”, meaning to provide yourself or others with weapons or to provide what you need for a task. T: Nicely done! 根据上面提供的信息，回答下列问题： （1）该教学片段的语言教学目标和策略目标分别是什么？（8 分） （2）该教师采取了哪三种方法达成上述目标（12分） （3）该教师教学的一个优点和一个缺点分别是什么？（10分）